Brace and bit



' (No Model.)

J. W. BANNER.

BRAGE AND BIT. v

Patented Oct. 30, 1894.

Flinn" E55 UNI-TED STATES PATENT DFFICE.

JOHN WVILLIAM BANNER, OF BANNERSELK, NORTH CAROLINA.

BRACE AND BIT.

SPECIFICATION forming part of Iietters Patent No. 528,137, datedOcto'ber30,1894.

APPIioatiDn filed June 15, 1894 serial No. 14.704. (No model.)

To all whom it may concern.-

Be it known that I, J OHN WILLIAM BAN- NER, a citizen of the UnitedStates, residing at Banners Elk, in the county of Watauga and State ofNorth Carolina, have invented a new and usefulImprovement in a Brace andBit, of which the following is a specification.

My invention relates to an improvement in a brace and bit, and itconsists in the peculiar construction and combination of devices that iwill be more fully set forth hereinafter, and particularly pointed outin the claims.

In the drawings, Figure 1 is a side view of a brace and bit embodying myimprovements. Fig. 2 is a vertical longitudinal sectional view of thesame.

A represents a round body, which is made tending rearwardly at one endand passing through the body A. forming an angle recess as at E. and setat an angle of about fiftyfive degrees, pointing in the same directionas cross groove 0. On the rear end of the recess E. is a fiat surfaceand projection with a cross groove F. to receive the shoulder rim onscrew tap G. said tap being screwed on the rear end of the clamp bar H.with the shoulder rim fitting snugly in the groove F. as shown in thedrawings, whereby it will be seen that a back turn on the tap G. willloosen and move out the bit and a forward turn on the tap will draw inand tighten the same.

II represents a clamp bar having a threaded rear end to receive thescrew tap G. said bar having also a crook fitting snugly in the re cessE the front end of the same fitting in the longitudinal groove, said barbeing provided on each side at its front end with outwardly extendingprojections I. each being set at an angle of about fifty-five degreespointing in the same direction as the crook and recess E. so, that abackturn on the screw. cap moves the bar out and a forward turn willdrawthe bar back and tighten the same. The clamping bar is made inside withan acute angle gutter andthe headAis made flat, the two forming aequilateral triangular adjustable socket being operated by screw tap Gthus allowing the bits to be moved forward so as to bore a deeper holeor sink deep into the socket so as to prevent the weak bits fromspringing and having the equilateral triangular bit shank fitting thesame. Dbviously the triangular shank may have a crook fitting in thehole in the clamping bar and when moved forward will fit in the gutterholding as an auxiliary means when the bit is allout of the socket butone half inch.

The operation of my brace is as follows: The hand nut onthe clamp bar isturned about one round and the bit introduced the shank dropping to thebottom of the socket. Then the nut is turned drawing in the clamping barin its leverage form pressing with great force against the shank of thebit holding it firmly. To project a bit so as to bore a deeper hole,loosen the nut and slide the bit forward until there is only one halfinch of the rear end of the shank left in the socket. Then turn the nuttill the bit is tight. The hole can then be bored two inches deeperHaving thus described my invention, I claim- 1. In a brace bit socketand bit shank the combination of the head A having the recess Eextending at an angle across and the slots 0 0 parallel to such recesswith the clamping bar [-I having a part to fit the recess andprojections I I fitting the slots 0 c and means for drawing in theclamping bar with the bit shankhaving the equilateral triangular shapeand with the screw tap G said tap having the circumferential flange Kand being screwed on the rear end of theclamping bar with the flangefitting in the groove F, the head A having a projection I on the rearend extending out over the flange so as to keep the tap from giving backa means for drawing in and pressing out the clam-ping bar, substantiallyas described.

2. In a brace bit socket and bit shank the combination of the head Ahaving the recess E extending at an angle across and the slots 0 aparallel to such recess with the clamping bar H having a part to fit therecess and projections to fit the slots with the screw tap G, and withthe equilateral triangular shaped bit shank being secured by atriangular socket one side of said socket being represented by theinside of the head A and the other two by an acute angled gutter in theclamping bar which is adjusted to the bit shank by screw tap G allowingthe bit to slide forward so as to bore a deeper hole substantially as de:0 scribed.

In testimony that I claim the foregoing as my own I have hereto affixedmy signaturein the presence of two witnesses.

J OI-IN WILLIAM BANNER.

Witnesses:

R. L. LOWE, M. E. PROFFITT.

